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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
from twisted.trial import unittest
from twisted.python import components
from twisted.pair import ip, raw
from zope import interface
@interface.implementer(raw.IRawDatagramProtocol)
class MyProtocol:
def __init__(self, expecting):
self.expecting = list(expecting)
def datagramReceived(self, data, **kw):
assert self.expecting, 'Got a packet when not expecting anymore.'
expectData, expectKw = self.expecting.pop(0)
expectKwKeys = expectKw.keys()
expectKwKeys = list(sorted(expectKwKeys))
kwKeys = kw.keys()
kwKeys = list(sorted(kwKeys))
assert expectKwKeys == kwKeys, "Expected %r, got %r" % (expectKwKeys, kwKeys)
for k in expectKwKeys:
assert expectKw[k] == kw[k], "Expected %s=%r, got %r" % (k, expectKw[k], kw[k])
assert expectKw == kw, "Expected %r, got %r" % (expectKw, kw)
assert expectData == data, "Expected %r, got %r" % (expectData, data)
class IPTests(unittest.TestCase):
def testPacketParsing(self):
proto = ip.IPProtocol()
p1 = MyProtocol([
(b'foobar', {
'partial': 0,
'dest': '1.2.3.4',
'source': '5.6.7.8',
'protocol': 0x0F,
'version': 4,
'ihl': 20,
'tos': 7,
'tot_len': 20+6,
'fragment_id': 0xDEAD,
'fragment_offset': 0x1EEF,
'dont_fragment': 0,
'more_fragments': 1,
'ttl': 0xC0,
}),
])
proto.addProto(0x0F, p1)
proto.datagramReceived(b"\x54" #ihl version
+ b"\x07" #tos
+ b"\x00\x1a" #tot_len
+ b"\xDE\xAD" #id
+ b"\xBE\xEF" #frag_off
+ b"\xC0" #ttl
+ b"\x0F" #protocol
+ b"FE" #checksum
+ b"\x05\x06\x07\x08"
+ b"\x01\x02\x03\x04"
+ b"foobar",
partial=0,
dest='dummy',
source='dummy',
protocol='dummy',
)
assert not p1.expecting, \
'Should not expect any more packets, but still want %r' % p1.expecting
def testMultiplePackets(self):
proto = ip.IPProtocol()
p1 = MyProtocol([
(b'foobar', {
'partial': 0,
'dest': '1.2.3.4',
'source': '5.6.7.8',
'protocol': 0x0F,
'version': 4,
'ihl': 20,
'tos': 7,
'tot_len': 20+6,
'fragment_id': 0xDEAD,
'fragment_offset': 0x1EEF,
'dont_fragment': 0,
'more_fragments': 1,
'ttl': 0xC0,
}),
(b'quux', {
'partial': 1,
'dest': '5.4.3.2',
'source': '6.7.8.9',
'protocol': 0x0F,
'version': 4,
'ihl': 20,
'tos': 7,
'tot_len': 20+6,
'fragment_id': 0xDEAD,
'fragment_offset': 0x1EEF,
'dont_fragment': 0,
'more_fragments': 1,
'ttl': 0xC0,
}),
])
proto.addProto(0x0F, p1)
proto.datagramReceived(b"\x54" #ihl version
+ b"\x07" #tos
+ b"\x00\x1a" #tot_len
+ b"\xDE\xAD" #id
+ b"\xBE\xEF" #frag_off
+ b"\xC0" #ttl
+ b"\x0F" #protocol
+ b"FE" #checksum
+ b"\x05\x06\x07\x08"
+ b"\x01\x02\x03\x04"
+ b"foobar",
partial=0,
dest='dummy',
source='dummy',
protocol='dummy',
)
proto.datagramReceived(b"\x54" #ihl version
+ b"\x07" #tos
+ b"\x00\x1a" #tot_len
+ b"\xDE\xAD" #id
+ b"\xBE\xEF" #frag_off
+ b"\xC0" #ttl
+ b"\x0F" #protocol
+ b"FE" #checksum
+ b"\x06\x07\x08\x09"
+ b"\x05\x04\x03\x02"
+ b"quux",
partial=1,
dest='dummy',
source='dummy',
protocol='dummy',
)
assert not p1.expecting, \
'Should not expect any more packets, but still want %r' % p1.expecting
def testMultipleSameProtos(self):
proto = ip.IPProtocol()
p1 = MyProtocol([
(b'foobar', {
'partial': 0,
'dest': '1.2.3.4',
'source': '5.6.7.8',
'protocol': 0x0F,
'version': 4,
'ihl': 20,
'tos': 7,
'tot_len': 20+6,
'fragment_id': 0xDEAD,
'fragment_offset': 0x1EEF,
'dont_fragment': 0,
'more_fragments': 1,
'ttl': 0xC0,
}),
])
p2 = MyProtocol([
(b'foobar', {
'partial': 0,
'dest': '1.2.3.4',
'source': '5.6.7.8',
'protocol': 0x0F,
'version': 4,
'ihl': 20,
'tos': 7,
'tot_len': 20+6,
'fragment_id': 0xDEAD,
'fragment_offset': 0x1EEF,
'dont_fragment': 0,
'more_fragments': 1,
'ttl': 0xC0,
}),
])
proto.addProto(0x0F, p1)
proto.addProto(0x0F, p2)
proto.datagramReceived(b"\x54" #ihl version
+ b"\x07" #tos
+ b"\x00\x1a" #tot_len
+ b"\xDE\xAD" #id
+ b"\xBE\xEF" #frag_off
+ b"\xC0" #ttl
+ b"\x0F" #protocol
+ b"FE" #checksum
+ b"\x05\x06\x07\x08"
+ b"\x01\x02\x03\x04"
+ b"foobar",
partial=0,
dest='dummy',
source='dummy',
protocol='dummy',
)
assert not p1.expecting, \
'Should not expect any more packets, but still want %r' % p1.expecting
assert not p2.expecting, \
'Should not expect any more packets, but still want %r' % p2.expecting
def testWrongProtoNotSeen(self):
proto = ip.IPProtocol()
p1 = MyProtocol([])
proto.addProto(1, p1)
proto.datagramReceived(b"\x54" #ihl version
+ b"\x07" #tos
+ b"\x00\x1a" #tot_len
+ b"\xDE\xAD" #id
+ b"\xBE\xEF" #frag_off
+ b"\xC0" #ttl
+ b"\x0F" #protocol
+ b"FE" #checksum
+ b"\x05\x06\x07\x08"
+ b"\x01\x02\x03\x04"
+ b"foobar",
partial=0,
dest='dummy',
source='dummy',
protocol='dummy',
)
def testDemuxing(self):
proto = ip.IPProtocol()
p1 = MyProtocol([
(b'foobar', {
'partial': 0,
'dest': '1.2.3.4',
'source': '5.6.7.8',
'protocol': 0x0F,
'version': 4,
'ihl': 20,
'tos': 7,
'tot_len': 20+6,
'fragment_id': 0xDEAD,
'fragment_offset': 0x1EEF,
'dont_fragment': 0,
'more_fragments': 1,
'ttl': 0xC0,
}),
(b'quux', {
'partial': 1,
'dest': '5.4.3.2',
'source': '6.7.8.9',
'protocol': 0x0F,
'version': 4,
'ihl': 20,
'tos': 7,
'tot_len': 20+6,
'fragment_id': 0xDEAD,
'fragment_offset': 0x1EEF,
'dont_fragment': 0,
'more_fragments': 1,
'ttl': 0xC0,
}),
])
proto.addProto(0x0F, p1)
p2 = MyProtocol([
(b'quux', {
'partial': 1,
'dest': '5.4.3.2',
'source': '6.7.8.9',
'protocol': 0x0A,
'version': 4,
'ihl': 20,
'tos': 7,
'tot_len': 20+6,
'fragment_id': 0xDEAD,
'fragment_offset': 0x1EEF,
'dont_fragment': 0,
'more_fragments': 1,
'ttl': 0xC0,
}),
(b'foobar', {
'partial': 0,
'dest': '1.2.3.4',
'source': '5.6.7.8',
'protocol': 0x0A,
'version': 4,
'ihl': 20,
'tos': 7,
'tot_len': 20+6,
'fragment_id': 0xDEAD,
'fragment_offset': 0x1EEF,
'dont_fragment': 0,
'more_fragments': 1,
'ttl': 0xC0,
}),
])
proto.addProto(0x0A, p2)
proto.datagramReceived(b"\x54" #ihl version
+ b"\x07" #tos
+ b"\x00\x1a" #tot_len
+ b"\xDE\xAD" #id
+ b"\xBE\xEF" #frag_off
+ b"\xC0" #ttl
+ b"\x0A" #protocol
+ b"FE" #checksum
+ b"\x06\x07\x08\x09"
+ b"\x05\x04\x03\x02"
+ b"quux",
partial=1,
dest='dummy',
source='dummy',
protocol='dummy',
)
proto.datagramReceived(b"\x54" #ihl version
+ b"\x07" #tos
+ b"\x00\x1a" #tot_len
+ b"\xDE\xAD" #id
+ b"\xBE\xEF" #frag_off
+ b"\xC0" #ttl
+ b"\x0F" #protocol
+ b"FE" #checksum
+ b"\x05\x06\x07\x08"
+ b"\x01\x02\x03\x04"
+ b"foobar",
partial=0,
dest='dummy',
source='dummy',
protocol='dummy',
)
proto.datagramReceived(b"\x54" #ihl version
+ b"\x07" #tos
+ b"\x00\x1a" #tot_len
+ b"\xDE\xAD" #id
+ b"\xBE\xEF" #frag_off
+ b"\xC0" #ttl
+ b"\x0F" #protocol
+ b"FE" #checksum
+ b"\x06\x07\x08\x09"
+ b"\x05\x04\x03\x02"
+ b"quux",
partial=1,
dest='dummy',
source='dummy',
protocol='dummy',
)
proto.datagramReceived(b"\x54" #ihl version
+ b"\x07" #tos
+ b"\x00\x1a" #tot_len
+ b"\xDE\xAD" #id
+ b"\xBE\xEF" #frag_off
+ b"\xC0" #ttl
+ b"\x0A" #protocol
+ b"FE" #checksum
+ b"\x05\x06\x07\x08"
+ b"\x01\x02\x03\x04"
+ b"foobar",
partial=0,
dest='dummy',
source='dummy',
protocol='dummy',
)
assert not p1.expecting, \
'Should not expect any more packets, but still want %r' % p1.expecting
assert not p2.expecting, \
'Should not expect any more packets, but still want %r' % p2.expecting
def testAddingBadProtos_WrongLevel(self):
"""Adding a wrong level protocol raises an exception."""
e = ip.IPProtocol()
try:
e.addProto(42, "silliness")
except components.CannotAdapt:
pass
else:
raise AssertionError('addProto must raise an exception for bad protocols')
def testAddingBadProtos_TooSmall(self):
"""Adding a protocol with a negative number raises an exception."""
e = ip.IPProtocol()
try:
e.addProto(-1, MyProtocol([]))
except TypeError as e:
if e.args == ('Added protocol must be positive or zero',):
pass
else:
raise
else:
raise AssertionError('addProto must raise an exception for bad protocols')
def testAddingBadProtos_TooBig(self):
"""Adding a protocol with a number >=2**32 raises an exception."""
e = ip.IPProtocol()
try:
e.addProto(2**32, MyProtocol([]))
except TypeError as e:
if e.args == ('Added protocol must fit in 32 bits',):
pass
else:
raise
else:
raise AssertionError('addProto must raise an exception for bad protocols')
def testAddingBadProtos_TooBig2(self):
"""Adding a protocol with a number >=2**32 raises an exception."""
e = ip.IPProtocol()
try:
e.addProto(2**32+1, MyProtocol([]))
except TypeError as e:
if e.args == ('Added protocol must fit in 32 bits',):
pass
else:
raise
else:
raise AssertionError('addProto must raise an exception for bad protocols')
Private